CVE-2026-78365

IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification

Published Aug 24, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
Authorization Bypass Through User-Controlled Key in the supplier API in Roskus Prospero Flow CRM 4.0.0 through 5.3.1 allows any authenticated user to read and modify another company's supplier record, and to reassign it to their own company, via a PUT request to /api/supplier/{id} setting company_id in the body.

Remediation

Vendor Solution

Upgrade to 5.3.2 or later; first tagged release with the fix is v5.5.3. Review the supplier table for altered company_id values and rotate exposed order-portal credentials and bank details.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Authorization Bypass Through User-Controlled Key in the supplier API in Roskus Prospero Flow CRM 4.0.0 through 5.3.1 allows any authenticated user to read and modify another company's supplier record, and to reassign it to their own company, via a PUT request to /api/supplier/{id} setting company_id in the body.
Title IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification
First Time appeared Roskus
Roskus prospero Flow Crm
Weaknesses CWE-639
CWE-862
CPEs cpe:2.3:a:roskus:prospero_flow_crm:*:*:*:*:*:*:*:*
Vendors & Products Roskus
Roskus prospero Flow Crm
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Secur0
Published
Updated
Aug 24, 2026, 1:01 PM
Reserved
Aug 24, 2026, 11:49 AM
Status
Deferred
Published
Aug 24, 2026, 1:19 PM
Modified
Oct 12, 2026, 3:10 PM